CODEWITHSUNDEEP
pythonlistfor-loopset
David Hernandez
David Hernandez

Reputation: 79

For loop not updating my list as expected in python

I'm struggling with this code not outputing what I'm expecting.

Here the code:

'base' is a list of sets

'items' is a list of str

base = [{'🌭', '🍔'},{'🌭', '🍕'},{'🌮', '🍔'},{'🌮', '🍕'},{'🍆', '🍑'}]
items = ['🌭','🍔','🍕','🌮','🍆','🍑']

for i in items:
    for j in base:
        j.add(i)

My result is this if I print base

[{'🌭', '🌮', '🍆', '🍑', '🍔', '🍕'},
 {'🌭', '🌮', '🍆', '🍑', '🍔', '🍕'},
 {'🌭', '🌮', '🍆', '🍑', '🍔', '🍕'},
 {'🌭', '🌮', '🍆', '🍑', '🍔', '🍕'},
 {'🌭', '🌮', '🍆', '🍑', '🍔', '🍕'}]

But I'm looking to have something like this, where every item on items gets added to every set in base.


[{'🌭', '🌭', '🍔'},
 {'🍔', '🌭', '🍔'},
 {'🍕', '🌭', '🍔'},
 {'🌮', '🌭', '🍔'},
 {'🍆', '🌭', '🍔'},
 {'🍑', '🌭', '🍔'},
 {'🌭', '🌭', '🍕'},
 {'🍔', '🌭', '🍕'},
 {'🍕', '🌭', '🍕'},
 {'🌮', '🌭', '🍕'},
 {'🍆', '🌭', '🍕'},
 {'🍑', '🌭', '🍕'},
...]

Upvotes: 0

Views: 519

Answers (1)

dman
dman

Reputation: 26

You won't get what you need with sets, which don't allow you to repeat items. Convert it to list, and then flip the loop:

base = [{'🌭', '🍔'},{'🌭', '🍕'},{'🌮', '🍔'},{'🌮', '🍕'},{'🍆', '🍑'}] items = ['🌭','🍔','🍕','🌮','🍆','🍑'] base2 = [] for i in base: for j in items: k = list(i).copy() k.append(j) base2.append(k) base2

Upvotes: 1

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